/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package com.winbaoxian.module.cas.filter;


import org.jasig.cas.client.util.AbstractConfigurationFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

public class WinCasLogoutFilter extends AbstractConfigurationFilter {

    private static Logger logger = LoggerFactory.getLogger(WinCasLogoutFilter.class);

    /**
     * 尝试注销
     *
     * @param request
     * @param response
     * @return
     */
    private boolean tryLogout(ServletRequest request, ServletResponse response) {
        try {
            ((HttpServletRequest) request).getSession().invalidate();
        } catch (Exception e) {
            logger.error("cas logout failed", e);
        }
        return true;
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
        tryLogout(request, response);
        filterChain.doFilter(request, response);
    }

    @Override
    public void destroy() {

    }
}
